Minor punctuation errors have been corrected.
Some inconsistencies in hyphenation have been left as printed.
In the text version underscores have been used to indicate _italics_,
and equals signs to show =bold= text.
Figure numbering is not consistent through the book.
p 79. The figure here is mislabelled as Fig 2 and has been corrected to
Fig. 1.
p 107. Fig14 is out of order and repeated further on, left as printed.
p. 58. “Half the length of brass piece” has been corrected to “Half the
length of the brass piece”.
p. 106. “50 feet, ⅞ inch pien” changed to “50 feet, ⅞ inch pine”.
p. 144. Fig. 3 appears to be upside down. It has been left as printed.
p. 166. “No we have a pile of books” changed to “Now we have a pile of
books”.
p. 167. “The back cloth is always at beast an inch longer”
changed to “The back cloth is always at best an inch longer”.
p. 174. “hindrances that I had to encouter” changed to “hindrances that
I had to encounter”.